Sparking plug suitable for internal-combustion engines



R. L. ASPDEN March 12, 1929.

smzxme PLUG suzmsmz FOR INTERNAL consusnon ENGINES 1 Filed June 1, 1927 i Great Britain June 21, 1926.

RALPH LEONARD ASPDEN, OF GHOBLEY, ENGLAND.

EBNAL-COMBUSTION ENGIN 27, and

Patented Mar. 12, 1929.

UNITED STATES .EATENT OFFICE.

SPARKENG FLUC- SUITABLE F0 w. INS.

Application filed 

